The space you allocate for the NEWCKPTn data sets (both on DASD and on a Coupling facility) should be sufficient to hold all the information in its primary, CKPTn, counterpart. Therefore, allocate this space as at least equal to that allocated for the CKPTn data sets. (For further information, see the Syntax for checkpoint space allocation on DASD.)

If these data sets are not defined in your initialization data, JES2 will not provide default data sets, but you can define these data sets during a checkpoint reconfiguration dialog. If defined at initialization, these data sets are only defined and not allocated.

To respecify the CKPTn data set, you must define the respective NEWCKPTn data set information using one of four methods. These methods are presented in order of recommendation.